#21344C
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.05 254.8), rgb(33, 52, 76).
Aa
White text reads best on this color (12.64:1).
About this color
#21344C is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.050 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.020 away. White text reads best on it, at 12.64:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.64:1 |
Values
| HEX | #21344C |
| RGB | rgb(33, 52, 76) |
| HSL | hsl(213, 39%, 21%) |
| OKLCH | oklch(32.1% 0.05 254.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #21344C | 12.64:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #21344C | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #21344C text on white | 12.64:1 | AAA | Lc 98.6 | Preferred for body text |
| #21344C text on black | 1.66:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#78A3DB
oklch(70.6% 0.095 255.3)
-
Step 500
500
#548CD1
oklch(63.2% 0.12 254.5)
-
Step 600
600
#3874BE
oklch(55.6% 0.131 255.1)
-
Step 700
700
#2A61A4
oklch(49.1% 0.122 255.1)
-
Step 800
800
#245085
oklch(42.8% 0.101 254.6)
-
Step 900
900
#22426A
oklch(37.5% 0.079 255)
-
Step 950
950 (this color)
#21344C
oklch(32.1% 0.05 254.8)
#21344C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2B354D | 0.015 |
| Deuteranopia (no green cones) | #25314C | 0.011 |
| Tritanopia (no blue cones) | #0C393C | 0.044 |
| Achromatopsia (no color) | #333333 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21344C
#21344C
oklch(32.1% 0.05 254.8)
- #422F13
#422F13
oklch(32.1% 0.05 74.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #21344C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.020
- Gunmetal #293241 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.027
- Midnight Green #073B4C ΔE 0.030
- Onyx #343A40 ΔE 0.044
- Marine #042E60 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.052
Use #21344C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.